Device for sinking holes in the soil



Feb 13, 1923 A. BRON DEVICE FOR SINKING HOLES IN THE SOIL Filed Oct. 24,1921 ma @M Patented Feb. id, @923.

/ ALTE BRON, OF AIJZSTEBDAM, NETHERLANDS.

DEVICE FOR SINHING HOLES IN THE SOIL.

Application filed October 24, 1921.

T 0 all to ham it may concern:

Be it known that 1, Ann Bnoir, architect, a subject of the Queen of theNetherlands. residing at Amsterdam, VVeesperzijde 134i. etherlands, haveinvented certain new and useful Improvements in Devices for SinkingHoles in the Soil, of which the following is a specification.

My invention relates to a device for sinking holes in the soil by theaid oi the flushing process. It is already known to suit holes in thesoil by means of tubes to the lower end of which pressure water is supplied. The pressure water loosesthe ground and brings it upward underpressure.

I have found that in practising this proc ess in the first place onlyvery "few holes are obtained with an exactly cylindrical wall andsecondly much time is wasted, as sinking the holes by means or" flushingin the way wherein itis generally executed, proceeds too slowly to beeconomical.

The side walls of the holes show more or less important deviations fromthe cylindrical shape and they are often not quite vertical, owing towhich it is afterwards very diflicult to drive piles of timber, concreteor other material.

According to my invention these inconveniences are removed andcompletely sound and smooth cylindrical side walls are ob tained.Moreover the process goes on much more quickly.

According to the invention in the execution of the process a flushingtube is used being preferably at some distance from its under endsurrounded by a ring provided with a downward pointed cutting edge.

, The ground is loosened and raised and at the same time the wall of thehole is smoothed cylindrically by means of the ring moving downwardswith the finishing tube. Preferably this ring is f ormed of two pieces,so that it consists of two substantially crescent shaped parts or rings,which may be connected to each other by fixing means as e. g.screw-bolts and at the same time clamp the flushing tube.

Moreover both rings may be provided with a how, the upper end of whichfits to the flushing tube, while the two upper ends Serial No. 510,164.

may be connected to each other. In this way it is absolutely assuredthat during the working the ring ever maintains its position with regardto the flushing tube.

The accompanying drawing illustrates an example of a device according tothe invention.

Fig. l is a longituidnal section and Fig. 2 is aplan view of it.

1 is the flushing tube. At some distance above its lower end a ring intwo parts is attached to it. This ring consists of two substantiallycrescent-shaped parts or rings 2 and 3. In the middle of each of thestraight sides 4 a boxor ring-half 5 is formed. These rings 5 clamp theflushing tube 1, after the fixing or clamping bolts 6 having beenscrewed by means of nuts 7. Each ring-half 2 and 3 is further providedwith a cutting edge 7 at the lower end and with a how 8 at the upperend, these bows being disposed diametrically with regard to the clampingsides 4. These bows are both provided at the top with an annular part 9.llhese parts 9 may be attached to each other with bolts and nuts 10 forthe sake of clamping the flushing tube, so that there is no danger ofthe parts 2 and 3 altering their position with regard to the tube 1.

When flushing the holes the cutting edges cut in the ground and thusform a smooth, exactly cylindrical side wall of the desired section. Thepiles may be driven immediately thereupon without delay as no resistance is met with. The cutting of the soil by the cutting edges 7promotes a quick transport of the loosened ground upwardly and increasesthe pressure of the flushing water.

Finally a device according to the invention is distinguished bycheapness and sum pleness of construction.

Its fitting to the flushing tube and its removing therefrom are veryeasy and simple.

Having now particularly described and ascertained the nature of my saidinvention, I declare that what I claim to be my invention is:

1. Apparatus for sinking holes in the soil by means of the flushingprocess whereby cutting of the soil to the desired section of the holeis accomplished in the direction of the sinking, comprising a flushingtube, and a ring provided with a downward pointed cutting edge fitted tothe flushing tube preferably at some distance from the lower end of saidtube, substantially as described.

2. Apparatus according to claim 1, in which the ring is formed of twosubstantially crescent shaped members which are connected to each otherby suitable securing means, and

which members at the Same time clamp the flushing tube substantially asdescribed.

Apparatus according to claim 2, in which both members are provided witha bow, the upper end of which fits the flushing 15 tube While both upperends are connected to each other, substantially as described.

In testimony whereof, I affix my signature.

ALTE BRON.

